this works especially well for small businesses who simply want a no-hassle, great-to-use live chat system
I am going with Zopim for my chat platform as well. Excellent features and a great team cumult.com
In terms of backoffice support - the best choice available.
Without any doubt the only service that manages to both have advanced features and user friendly interface.
I like the complete dashboard with useful tools like shortcut answers. I don't like that it's in flash. I would love that they use status instead of messages like olark to notify user presence in IM mode.
If you like all of the above live chat software solutions you will be sure to like www.heybubble.com it is a free service, that features 4 customizable chat interfaces, monitoring in real time, and a non intrusive embedded chat window, that follows your visitor from page to page on your website. www.heybubble.com it is free, and is making changes to customer service experiences.